Two Dimensional Bounded Model Checking for Unbounded Client-Server Systems

EasyChair Preprint 8638

Abstract

Bounded model checking (BMC) is an efficient formal verification technique which allows for desired properties of a software system to be checked on bounded runs of an abstract model of the system. The properties are frequently described in some temporal logic and the system is modeled as a state transition system. In this paper we propose a novel counting logic, L_C, to describe the temporal properties of client-server systems with an unbounded number of clients. We also propose two dimensional bounded model checking (2D-BMC) strategy that uses two distinguishable parameters, one for execution steps and another for the number of tokens in the net representing a client-server system, and these two evolve separately, which is different from the standard BMC techniques in the Petri Nets formalism. This 2D-BMC strategy is implemented in a tool called DCModelChecker which leverages the 2D-BMC technique with a state-of-the-art satisfiability modulo theories (SMT) solver Z3. The system is given as a Petri Net and properties specified using L_C are encoded into formulas that are checked by the solver. Our tool can also work on industrial benchmarks from the Model Checking Contest (MCC). We report on these experiments to illustrate the applicability of the 2D-BMC strategy.

Keyphrases: Bounded Model Checking, Counting Logics, Petri nets, SAT solvers, temporal logics

@booklet{EasyChair:8638,
  author    = {Tephilla Prince},
  title     = {Two Dimensional Bounded Model Checking for Unbounded Client-Server Systems},
  howpublished = {EasyChair Preprint 8638},
  year      = {EasyChair, 2022}}